Active Time
1 Hour 30 Mins
Total, including cooling Time
2 Hours 45 Mins
Serves 8 to 10
Photo: Thomas J. Story

How to Make It

Step 1

Preheat oven to 350°. Generously brush a 10-cup nonstick Bundt pan with butter, then dust with 2 tbsp. cocoa powder; tip out excess.

Step 2

In a heatproof bowl, combine chocolate chips and the remaining 1/2 cup cocoa powder. Pour 1/4 cup boiling water on top and stir until smooth. Set aside. In a second bowl, sift together flour, baking soda, baking powder, and salt; set aside.

Step 3

In a large bowl with a mixer on medium speed, beat granulated and brown sugars with mayonnaise until well combined, about 1 minute. Add eggs and egg yolk one at a time, beating just until incorporated. Beat in vanilla.

Step 4

With mixer on low speed, add flour mixture in three additions, alternating with chocolate mixture and beating just until blended; scrape bowl as needed.

Step 5

Pour batter into prepared pan. Bake cake until a toothpick inserted into center comes out clean, 40 to 50 minutes. Let cool on a rack 15 minutes, then loosen from pan with a small spatula and turn out onto rack to cool completely.

Step 6

Set cake on a platter, sift powdered sugar on top, and serve with caramel sauce.

Step 7

*Find at

Step 8

Make ahead: Through step 4, up to 1 day, wrapped airtight.

Step 9

Note: Nutritional analysis is per serving of cake only.

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